How San Diego Outpaces Los Angeles in Apartment Construction Through Permitting, Planning Consistency, and Policy Signals

San Diego’s apartment pipeline is growing as Los Angeles slows

San Diego County has expanded its apartment construction pipeline while Los Angeles County has moved in the opposite direction, widening a gap between the state’s two largest urban regions at a time of persistent housing shortages. Recent market tracking shows the number of apartments under construction in San Diego County increased compared with three years earlier, while Los Angeles County’s new apartment construction fell sharply over the same period and reached its lowest level in more than a decade by late 2025.

The divergence is occurring despite shared statewide pressures affecting developers across California, including high financing costs, elevated construction expenses, and uncertainty in labor availability. Local policy and process differences, however, are playing an outsized role in shaping where multifamily projects pencil out.

Permitting and approvals: fewer discretionary hurdles

A central factor separating the regions is the structure of approvals. In San Diego, projects that align with adopted plans and zoning can often move through staff-level review without extended rounds of discretionary decisions. That tends to reduce the time and uncertainty associated with securing entitlements, two variables that can materially affect construction loan terms and total project costs.

Los Angeles, by contrast, has a larger share of projects requiring discretionary actions and political approvals. These steps can introduce additional public hearings, negotiations over project terms, and the potential for delays or redesigns. For developers and lenders, longer timelines translate into higher carrying costs and heightened risk, which can narrow the pool of feasible projects.

Planning consistency and iterative zoning updates

San Diego has pursued periodic updates to community plans and zoning rules, including changes intended to concentrate growth near transit corridors and job centers. These updates can create clearer expectations about where new density is allowed and what types of projects are likely to be approved, improving predictability for both builders and neighborhood stakeholders.

This approach has also been tied to policy efforts emphasizing housing production through streamlined permitting and rezoning capacity in areas targeted for growth.

Policy signals: rent regulation and transaction costs

Los Angeles has strengthened tenant protections and tightened rules affecting rent-stabilized units. While these measures are designed to protect renters from rapid rent increases, developers and market analysts have argued that broader regulatory signals can influence long-term investment decisions, particularly when paired with other constraints.

Another frequently cited deterrent is Los Angeles’ voter-approved Measure ULA transfer tax, which applies to high-value property sales within the city. Research assessing post-implementation market activity has linked the tax to reduced sales activity in categories that often precede new multifamily development, alongside estimates of reduced housing production tied to fewer transactions and higher project-level costs.

What it means for renters and future supply

In both regions, demand for rentals remains high and vacancy rates are tight in many submarkets, contributing to elevated rents. The near-term question is whether streamlined approvals and clearer planning in San Diego can translate into sustained completions at scale, and whether Los Angeles can reduce barriers without undermining tenant protections or funding streams for affordable housing.

• San Diego: growing multifamily construction pipeline, aided by clearer alignment between plans, zoning, and approvals.
• Los Angeles: weaker apartment construction amid higher entitlement risk, added transaction costs, and regulatory complexity.
• Both regions: still constrained by financing costs, construction pricing, and workforce uncertainty.

The difference is not a single rule, but a cumulative effect of timelines, predictability, and the cost structure created by local policy choices.